A Salicylbisimine Cage Compound with High Surface Area and Selective CO2/CH4 Adsorption


  • We thank C. Eggers for measuring the gas adsorption, S. Blessing for recording the PXRD spectra (both Institute of Inorganic Chemistry I, Ulm University), and H. Sievers (Quantachrome GmbH, Germany) for helpful discussions. We are grateful to G. Weber (Organic Chemistry III, Ulm University) for performing the thermogravimetric analysis. Further, we would like to thank the Deutsche Forschungsgemeinschaft (DFG project MA4061/4-1) and the Fonds der Chemischen Industrie for generous financial support. Solvay Fluorochemicals GmbH is gratefully acknowledged for the donation of chemicals.


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Preference for polar adsorbates: The crystalline porous organic cage compound shown has an exceptional high surface area (1566 m2 g−1) and selective gas uptake. The compound preferably adsorbs CO2 (9.4 wt %) over methane (0.98 wt %).